Lamp-socket connection



H. H. ASHINGER.

LAMP SOCKET CONNECTION.

' APPLICATION FILED DECJB, I9l8.

Patented Jan 10,1922.

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"- @hwwf UNHEL TIES HERMAN H. ASHINGER, or SOUTH BEND, INDIANA, AssIeNon r0 enoncn Curran coMrANY, or SOUTH BEND, INDIANA, A coRronA'rIoN'or INDIANA.

LAMP-SOCKET CONNECTION.

incense.

Specification of Letters Patent.

Application filed December 18, 1918. Serial 1\'!'o. 267,246.

To all whom it may concern:

Be it known that I, HERMAN H. Asrrinenn, a citizen of the United States, residing at South Bend, in the county of St. Joseph and State of Indiana, have invented a certain new and useful Improvement in Lamp- Socket Connections, of which the following is a specification.

My invention relatesto electric lighting devices, the present application being a division from my co-pending application filed February 25, 1918, Serial Number 219,102 patented February 25, 1918, No. 1297.432. Broadly considered the invention which forms the subject of this present application relates to means whereby the lamp socket or adaptor may be readily attached to and detached from the base or receptacle. The purpose is to simplify the construction so that the shell or socket may be adjustedto place by a straightdn push followed by a slight rotation about the longitudinal axis. As a result of my improved construction when this movement has, been performed the socket will be securely held and cannot become loose even though submitted to continuous vibration. In its most developed form the. socket is a film socket, for series lighting and the base or receptacle has a switch which opens automatically when the socket is inserted, thus putting in circuit the terminals of the socket so that when the lamp is inserted in the socket the lamp terminals will beput in circuit. One of the objects of Figure 1 is an axial section of a socket and base embodying my invention.

Figure 2 is a bottom plan of the parts shown in Figure 1, omitting the socket and shade holder.

Figure 3 is a perspective View of the socket and suspension mechanism.

Like reference numerals denote like parts.

throughout the several views.

In the illustrated form of the inventionthe socket 1 consists of a metallic shell internally threaded to receive the lamp base 7 2 and having a ring 3 of insulating material whereby it may be manipulated. The distud 22.

electric film 4 is held in position at the inner end of the socket by a retainer 5. hastened to the inner end of the socket are two hooks 7, 7, the ends of which point radially inward and are adapted to over-ride and be supported by the strips 8, 9 mounted in the base 10. In the present case these strips are secured by studs 11, 12 shown in perspective in Figure 3. The strips are arranged on the arc of a circle centered at the axis of the device and at the free ends.

have camlike shoulders or humps 13. the noses of which point downward. The strips are resilient and hence when the hooks are rotated against the noses a camlike action takes place, forcing the ends of the strips to descend and permit the hooks to pass over and beyond the shoulders 13. After this the shoulders rise and prevent the hooks from accidentally becoming dislodged. In lnserting the shell the operator simply pushes it straightin toward the body and then rotates it a slight distance, after which the hooks will overlie the strips 8. 9, and be securely held in place by the shoulders 18.

In my improved device the strips 8, 9 are not mere holding devices. One of them,

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the strip 9, serves also to put the lamp shell incircuit. This strip 9 is electrically connected by the stud 12, to a conductive terminal 15 which is fastened to the base 10 by the stud 12 and is provided with binding screws 16 for attachment to one of the supply conductors 17. The remaining supply conductor 19 is connected to the opposite terminal 20 by binding screws 21. Said terminal is secured to the base 10 by the The stud 22 also forms the means of attachment for the resilient line switch 25. Said switch is self closing and adapted to engage the strip 9 so as to bridge theterminals 20, 15 when the socket 1 is absent. This switch is provided with a conductive post 26 located in position tobe engaged'by the film retainer 5 and open theswitch when the. socket is inserted into the base 10;

In operation, when it is desired to insert the socket 1 into the base l0, the operator merely thrusts the socket straight in and then gives it a slight turn so as to bring the hooks 7 over the humps 18. After the hooks have passed over these humps the resilience" securely retain the hooks in position. At the same time the filmretainer engages the post 26 and opens the line switch 25.

it will be observed that the parts are simple andfew in number and simply operated. The strip 9 performs the dual function of a suspension element for the socket and a contact to cooperate with the switch 25. This strip also, by engaging one of the books 7, renders said hook and the shell or socket to which it is attached alive,that is, in circuit with the terminal 15. As the two hooks are symmetrically formed and placed, either one of them may engage the strip 9 and hence it is not necessary to exert any care as to which hook engages any particular strip. 1 7

Having thus described my invention what I claim as new and desire to secure by Letters Patent, is:

l. A series lighting-device having an insulating base providedwith a strip extending transverse the base, a socket closed at its inner end and adapted to receive the base of an electric lamp, a hook on the socket engageable over the strip by linear application and subsequent rotationof the socket,

and a normally closed resilient line switch tensioned and opened by said linear application of the socket and reacting against the closed end of the latter when tensioned to the resilient strip and the latter reacting against the hook and a normally closed resilient line switch tensioned and opened by said linear application of the socket and reacting against the closed end 01": the socket when tensioned to force the hook against the strip.

In witness whereof, I have hereunto subscrlbed my name.

HERMAN H; ASHINGER. v 

